Single Phase Shunt Capacitor

Single phase shunt capacitor is designed for low-voltage reactive power compensation systems that need phase-separated compensation, improved power factor, reduced reactive power loss, and better voltage quality. This self-healing low-voltage shunt capacitor is suitable for 50Hz or 60Hz low-voltage electrical systems and is mainly used in compensation cabinets, power factor correction systems, industrial distribution cabinets, and complete reactive power compensation assemblies. The product uses metallized polypropylene film as the dielectric and microcrystalline wax as the impregnant. Its self-healing structure helps improve long-term reliability under proper working conditions, especially in compensation systems where capacitors operate continuously with controllers, switching devices, fuses, and cabinet ventilation structures.

Although the keyword is single phase shunt capacitor, this product is more accurately applied as a 3YN phase-separated compensation capacitor, with internal star connection and neutral point lead-out. It is suitable for low-voltage systems where the reactive power demand of A, B, and C phases may not be balanced. In real distribution projects, phase imbalance often appears in commercial buildings, workshops, mixed-load facilities, small industrial systems, and cabinet retrofit projects. A phase-separated capacitor helps the compensation system respond more accurately to each phase instead of switching all three phases together. Our factory supplies this product for electrical panel manufacturers, compensation cabinet builders, industrial users, project contractors, and overseas distributors who need a reliable capacitor component for low-voltage compensation systems. With rated voltage of 250V and rated capacity from 3Kvar to 30Kvar, this single phase shunt capacitor series gives customers a practical specification range for different split compensation cabinet designs. It can also be matched with capacitor switching contactors, dynamic reactive compensation units, automatic power factor controllers, and other related components from our product range, helping buyers build a more complete reactive power compensation solution.

Note: YN capacitor uses internal star connection with neutral point lead-out. Other special specifications and models can be supplied according to customer requirements.

Phase-separated compensation cabinets

Used in low-voltage compensation cabinets where A, B, and C phases need more accurate compensation according to actual phase load conditions.

Power factor correction systems

Applied as a capacitor component in power factor correction systems to improve power factor, reduce reactive power loss, and support better voltage quality.

Three-phase unbalanced load systems

Suitable for electrical systems with uneven phase loads, such as mixed commercial loads, small industrial equipment, production workshops, and building distribution systems.

Industrial distribution cabinets

Used in factories, workshops, pump rooms, compressor stations, motor-driven equipment systems, and other sites where reactive power compensation is required.

Complete reactive power compensation assemblies

Matched with switching devices, controllers, fuses, wiring systems, and cabinet ventilation structures to build complete low-voltage compensation solutions.

Our factory has been engaged in electrical product manufacturing since the early 1990s, with long-term focus on capacitor switching contactors and reactive power compensation components. We operate a production facility of more than 3,000 square meters, have our own R&D team, and maintain a monthly production capacity of about 5,000 units. For overseas customers purchasing single phase shunt capacitor products in batches, this manufacturing foundation helps support stable supply, repeat orders, project replacement demand, and long-term cooperation.

Our product range includes capacitor switching contactors, AC contactors, self-healing low-voltage parallel power capacitors, dynamic reactive power compensation switching regulators, ultra-fast dynamic reactive power compensation switching regulators, intelligent capacitor composite switches, automatic reactive power compensation controllers, and harmonic filters. This makes it easier for cabinet manufacturers and distributors to source matched products for complete compensation cabinet projects. Instead of purchasing capacitors, switching devices, and controllers from different suppliers, customers can reduce communication cost and improve model matching efficiency through one experienced manufacturer.

Our factory has ISO9001 quality management system certification and CCC National Compulsory Product Certification. During production, we apply regular inspection methods and carry out 100% inspection before packing. Third-party inspection is accepted when required by customers or engineering projects. For this single phase shunt capacitor, quality control focuses on capacitance consistency, voltage grade, terminal condition, insulation performance, discharge performance, appearance quality, label accuracy, and packing condition.

Because capacitors operate continuously inside compensation cabinets, correct operating conditions are essential for long-term reliability. The capacitor should work under good ventilation conditions and must not be installed in closed, unventilated spaces. After the capacitor is cut off from the power supply, it should not be reconnected until the residual voltage drops to 10% of rated voltage. In normal applications, this process may take about 200 seconds, so the controller should include a re-switching lockout time after cut-off. If a general controller is used, a fast discharge device should be installed separately. These details help panel builders reduce operating risk and improve the reliability of the complete compensation system.

We support OEM/ODM service for customers who need branded supply or project-based product matching. Customization can be discussed according to actual order requirements, including product label, model selection, voltage level, capacity combination, packaging mark, and matching requirements for compensation cabinet projects. If customers provide technical drawings, prototypes, or project specifications, our factory can evaluate production feasibility and confirm suitable product options.

For distributors, flexible specification selection is important because different markets and cabinet designs may require different voltage levels, capacity ranges, and model combinations. This single phase shunt capacitor series covers common 250V phase-separated compensation specifications from 3Kvar to 30Kvar, making it easier to prepare local stock for multiple project needs. Samples can be provided before mass production for technical verification, and mixed specifications can be discussed according to order requirements.